Knife-sharpener.



A. JOHANSEN.

KNIFE SHARPENER.

APPLICATION FILED JUNE 29. 1911.

Patented Mar. 12, mm

ANDREAS JOHANSEN', OF COPENHAGEN, DENMARK.

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Specification of Letters Patent.

Patented Mar. i2, 191%.

Application filed June 29, 1917. Serial No. 177,786.

To all whom it may concern:

Be it known that I, ANDREAS J OHANSEIET, a subject of the King of Denmark, residing at 4 Brogade, Copenhagen, in the State of Denmark, have invented a new and useful Improvement in Knife-Sharpeners, of whlch the following is a specification.

The present invention relates to improvement in knife sharpeners especially for table knives and the like. The invention is illustrated in the accompanying drawings 1n which:

Figure 1 shows a side elevation,

Fig. 2 a plan view,

Fig. 3 an end view.

A flat bed plate 1 consisting of a strip of wrought iron, is provided with screws 2 or the like for attaching it to a table or support 3.

The plate 1 has integral with it the upturned part 4 formed by making two incisions .5 in the plate 1 and bending the part '4 upward at a right angle to the plate. Be-

yond the incision 5 at each side, there remains a part 6 forming a guide. These parts 6 support the angle piece 7 which is attached to the plate 1 by means of the screw 8.

Between the upturned part 4 and the upright portion of the angle-piece 7 are placed in suitable grooves the steel balls 10. These balls may conveniently be such as' a're in use, for cycle bearings. The arts 4 and 7 and consequently the balls eld between them are pressed toward each other by means of the screw 8.

1 The operation of the apparatus is as folows: The position of the balls having been adusted as aforesaid, a knife blade 11 to be sharpened is passed to and fro between the parts 4 and in such a mannerthat the edge 12 thereof engages between the balls 10. In this way the edge alone is subjected to friction and becomes sharpened without grinding away the surface of the blade, as commonly takes place with sharpeners of other constructions.

WhatI claim is:

'1. Apparatus for sharpening table knives and the like comprising a supporting plate,

uprights on said plate means for pressing said uprights toward one another, balls rigidly held between said uprights.

2. Apparatus for sharpening table knives and the like comprising a supporting plate, grooved uprights on said plate an adjustable screw passing through said uprights for the purpose of regulating their distance apart, and a pair of steel balls lodged in the grooves of said uprights and pressed thereby rigidly against one another.

In testimony whereof'I sign my name tov this specification in the presence of two subscribing witnesses.

ANDREAS J OHANSEN. 

